Electrical Specifications
27
3
3.6
AC Characteristics
Figure 3-1:
Timing
Diagrams
for timing numbers.
3.7
Pin Descriptions and Pinouts
All Atlas units regardless of package size or mounting configuration provide a common set of signals and functions
however the pin addresses and number of pins for various functions are different between the ultra compact Atlas
units and the compact Atlas units. In addition, the pin addresses are different between the horizontal and vertical
mounting configurations for each package size.
The following sections provide detailed pinouts for the two Atlas packages; ultra compact and compact, and the two
mounting configuration; horizontal and vertical.
All Atlas unit pins are 0.1 inch spacing and 0.025inch pin width.
Atlas
®
Digital Amplifier Complete Technical Reference
Timing Interval
No. Min
Max
T
SPI
, SPI clock cycle time
T1
125 nsec
Pulse duration, SPIClk high
T3
(0.5 T
SPI
-10) nsec
Pulse duration, SPIClk low
T4
(0.5 T
SPI
-10) nsec
SPIClk high to SPISO valid delay time
T5
30 nsec
SPISO date valid time after SPIClk low
T6
0 nsec
SPISI setup time before SPIClk low
T7
30 nsec
SPISI valid time after SPIClk low
T8
(0.5 T
SPI
-6) nsec
~SPICS low to first SPIClk high
T2
400 nsec
Last SPIClk low to ~SPICS high
T9
0.5 T
SPI
SPISI
SPISO
SPIClk
~SPICS
T1
T3
T2
T5
T6
data is valid
data
must be valid
T8
T4
T9
T7
